Sectional type boiler



Dec. 14, 1948.- w. s. ANDERSON, JR

SECTIONAL TYPE BOILER Filed April'2, 1945 y @www a?.

\Dec. 14, .1948. w, Q ANDESON, JR A 2,456,239

4 Sheets-Sheet 2 Filed April 2, 1945 Dec. 14, 1948. w. s. ANDERSON, JR

SECTIONAL TYPE BOILER 4 Sheets-Sheet 3 Filed April 2, 1945 Dec. 14, 194.8. v v w. s. ANDER-SOIN, JR

SEGTIONAL TYPE BOILER 4 Sheets-Sheet 4 Filed April 2, 1945 Patented Dec. 14, 1948 UNITED STATES PATENT OFFICE William S..v Anderson, Jr., Williamsport, Pa., asfsignor to Avco Manufacturing Corporation, a

corporation of Delaware Application April 2*, 1945,. Serial No. -585,985

(Cl. LZ2- 225)y Claims. l.r

The invention. relates to boilers.

yOne object. of the. invention is toprovide a boiler of the; sectional magazine feed type which includesy water conduits. at the sides. of the inclinedgrate. with the conduit at the upper end of. they inclined grate. disposed relatively higher than the Water conduit at the other side so as.

iso-.increase the capacity oi the rebox, reducer the .heiglathy of the Water lega and the Weight of the sections.. and any tendency of the Walls of the leg to rust due,4 to moisture intne iuel.

A further object of. the invention is to-provide a boiler of this type in which the combustion gases are directed longitudinally .by baiiles on the intermediate boiler sections to. travel longitudinally and thence toa nue. from which the prod ucts.- of combustion- .to. the stack.

A further object of the invention is to provide a boiler of this type. with avent from the fuel magazine. to the combustion gases flowing tothe. stack for preventing. any accumulation oi com-- bustlbl-e gases in, the fuel; in the magazine `and allowing any steam or moisture, usually present in coa-l, to escape with` the .combustion gases.

Another object of the invention isv toy provide. ribs cnthe boiler sections Afor allowing soot to escape .fromV the longitudinal. .ii-11e for the combustion gases` into the.v iirebox during. the :cleaning of the boiler.

Anotherobiectfof the invention vis toY improve the. constructionand operation. of the sectional magazine feed. type of boilers set.l iorth- U. S. Patent No. 1,800,915.

Other objects. of. the invention will appear from the detailed description.

The invention consists. in.- the several features hereinafter vset forth andmore particularly ydened; bycla-iins at the conclusion hereof.

In the drawings:

Fig. 1. is a side elevationof lone .of the intermediate boiler sections.

Fig. 2 is a sectionv taken. on. line 2-2 `ot Fig. i..

Fig. 3. is a section takenv online- 3--3 of Fig'. If.

Fig. 4 isy a section taken on line-4 4 of Fig. l.

Fig. 5 is an elevation ofthe inner side ofthe front boiler section.

Fig. 6- is a section takenoni :linefGv-lt .oi Fig. 5.

Figi. 7 is an eleva-tion oi the inner side ot the rear boiler section.

Fig. 8 is a section taken on line 8-8 of Fig. 7.

l lIhe. boiler comprises a front. generallyy desig- '2 natedv H., a rear `section generally designated l8,. and any desire-d number .ci intermedi-ate sections generally designated i3, which fit againstone another in face to tace; relation and are secured together by suitable tie-rods 2t. which 4extend through all the sections, as Wellu-nderstoodin the art. A single. inclined grate comprises bars 2l supportedin the assembled sections.. The vas'- semloled ,sections ferr-na fuelmagazi-ne a at one side of the upper portion o the boil-er, a rebox b over the grate, an ash pit c below thegrate, baffles dy in the intermediate sections over the. iirebox at one side :of the magazine a, a flue ey for combustion gasesy above-the-baiiie d and` upper nue vJ for -conducting combustion gases` to the stack, and Water conduitsV g., h and lc termed .of coinmunicatively connected (chambers. in the sections.v The front yboiler section lil in-l cludesuintegral side and top walls, and; any outer wall. 2l and an inner wall 28 join-edto the .front Wall byv .an inclined Wall 29A which extends along; the upper line of the incl-ined grate to. form a Water jacket. inthe front section which extends. upwardly to time top Wall of tl-1e.seci'.ion;'Wallis around the. .magazine deuropening .22 and the irebox door opening 23; walls torming asection- 30 of conduit g, a second 32 of conduit 11,-, and a section 33 of Water conduit lc; andl Walls forming vertical water legs. 34, 35 at the sides of: the section t1, allV of which sections.- and legs are coinmunicatively connected for the flow of Water' therethrough.. The Walls ci. section l'lare also extended to vform a verticallyextending portion 31 and an inclined portion 3.6 which form a sec.- tion of the inner side of. the magazine a with a chamber therein oommunicatively `connected to:4 the. water chamber in the front section. The side-legsf.. 35 ot boi-1er section Ivi below con-y duitfsections $0-, 32 are of light4 web formation andare notl provided with Water chambers. The inner face of the.v fron-t boiler-section |1- has an integral rib or bead 4B' which extends along the cleaning the ues e, f, and are normally closed by a removable plate 40. The Walls of section- 1.1. at the outer `side of and above the magazine deuropening 2.2 are formed of Webs: andv are not.

hollow. A baffle 90 for steam from conduit k is formed at the inner side of the chamber which communicates with conduit k in the upper portion oi section I'.' and extends between the inner and outer walls of said chamber. A steam outlet 51a is provided in the top wall of said chamber. An opening 9| in the lower portion of baile 95B permits steam to pass from the lower portion of said chamber through the baiiie to said outlet. Projections 59 may be formed on the inner wall of the front section to conform to grate contour.

The rear boiler-section I8 includes integral side and top walls and an outer wall 45, an inner wall 46 connected by an inclined wall extending over the grate, to form a water chamber extending from the inclined wall to the top of said section; walls forming a section 4S -of conduit g, a section 5l] of conduit h, and a section 5I of conduit k; walls forming water legs 52, 53 extending upwardly from the chambers 49 and 55, respectively, to the upper portion of boiler-section I8;

walls forming a vertical portion 54 and an inclined portion of a section oi the inner side of the fuel magazine a; walls forming a section of the flue f; walls 59 forming extensions overlying the end of the grate, all of which are provided with water chambers communicatively connected. The side legs 56 between the bottom walls of conduit sections 49 and 5l] and the base of boilersection I8 are formed of light webs and are not provided with water chambers. The inner side of rear section I8 is provided with a rib 5'I along its sides and top and a rib or bead 58 on the inner sides of magazine section 54, 55, and a rib or bead 'yalong the bottom of section of flue f, all of which are coplanar -to fit against corresponding ribs on an intermediate section I9. An opening 59 for-connection to a stack extends through the back section I 8 from the flue f. An outlet 5'! for steam is provided in the top wall of rear section I8 and an opening 5? is provided in the rear wall 41 for connection to a gauge safety valve. One or more openings 522iL may be formed in one side of the rear section for supplying secondary air to the i'lrebox. Projections 59a may be formed on the inner wall of the rear section to conform to grate contour. Y

Each intermediate section I9 comprises integral side and top walls, and walls forming sections BU, 6I and 62 of conduits g, h and lc, respectively; walls forming a vertical water leg 63 extending upwardly from section 60; walls 64 formed of webs and not hollow at the outer side top of the magazine; hollow walls forming a vertical side portion 65 and an inclined portion 66 of the inner side of a section ofthe magazine a, the inclined side portion being communicativelyrconnected by a narrow leg 56 with conduit-section 6I hollow walls forming a section of the flue e, a section of the lue j, and a baled, all of which have chambers therein communicatively connected for the flow of water therethrough. The sides of boiler-section I9 below the conduit-sections 60, 6I are -formed of light webs las at 54', 63' and are not lprovided with water chambers. Each of the faces of the rear boiler-section I8 terminates in a faced rib 'l5 which extends around its sides and top. Each face of section I9 is provided with a rib 8l at the inner side of the magazine-section therein and reversely inclined ribs 82, 83 extending along the bottom of the iiue f, lall of which are adapted to rit against correspondingly faced ribs on other intermediate sections or a rear or lfront section of the boiler. The upper end of the ribs 8| terminate below the ribs 'I0 to provide spaces for venting gas, steam or moisture around the iuel in the magazine a to the flue f for preventing combustion of the fuel in the magazine. The lower ends of reversely inclined ribs B2, 83 are spaced apart to permit soot from the flue f to drop into the rebox during the cleaning of said ue. Y

The lower ends of the grate-bars 2I are pivotally supported in lugs 5t which depend from the bottom wall oi conduit-sections 5@ and their upper ends are pivotally supported in recesses 5| formed in the inclined inner sides of the lower portion of the walls around conduit-section 5 I.

The sections of conduit h are ldisposed substantially at the upper end of the grate and at a considerably higher elevation than the conduit g andthe webs forming side wall or leg portions between the conduit h and the base of the boiler are of greater heighth than when the conduit g is disposed at the lower end of the grate. This results in greatly reducing the weight oi the boiler sections, increases the combustion space in the rebox, also shortens and provides a greater angle in the inclined portion of the side-portions c4 between the upper end of the grate and the adjacent vertical cuter side of the throat through which the coal is fed to the grate. This keeps the outer side of the magazine dry and above evaporating temperature to eliminate any tendency of the wall to rust due to moisture.

The contiguous walls forming sections of conduits g, hand k in the viront, rear and intermedi-ate boiler sections have openings for nipples 93 for communicatively connecting said sections, as well understood in the art. The front wall of the front section at conduit sections 30, 32 and 33 is provided with tapped openings for closure plugs.

The baffles d in the assembled Vboiler sections direct the hot gases from the rebed longitudinally forwardly and into the flue e from which the gases passA longitudinally forwardly into the front boiler section and thence upwardly and longitudinally rearwardly through the Ailue f to the stach for an efiicient interchange of heat between the flue gases and the boiler sections. The ribs 52 on rear boiler-section I and ribs 82 on the intermediate sections prevent any great amount of flow of gases 'from iiue c to flue f.

The walls in the boiler sections I9 around flue f are shaped to form an inwardly and upwardly inclined bottom, a vertical outer side and a hori zontal top with legs for the circulation of water. rThe walls in the intermediate sections forming the ilue e and baffles d extend upwardly and inwardly from the water legs 63 in parallel relation with the bottom of fiue f. This inclination and the reverse inclination of ribs 82 and 83 facilitate the cleaning of the flues.

In operation, the fuel stored in the magazine a of the assembled front, intermediate and rear boiler sections is automatically fed into the rebox at the upper portion 0i the grate through the openings between the legs 56. Some of the combustion gases pass upwardly in the rebox to the baffles d in the intermediate sections and the spaces between said baffles into the ue c where they flow forwardly to the front boiler section il in which they pass upwardly to the front of the fiue f and then now rearwardly to the opening 5S in the rear section 8 of the stack. 'I'he heat is eiciently transferred through the walls of the sections around the rebox, the bailies, the flues e and f, and the water legs.

' The invention exemplies a Aboiler of sectional magazine feed type with a single inclined grate which includes water conduits at the slides of the boiler, respectively, one of saidconduits being disposed substantially higher than the other and at the lower and upper ends vof the inclined grates and below the conduits of web formation, which resultan increase of combustion space in the iirebox, and a` substantial reductionin the Weight of the sections which are usually formed of castv metal. The invention also exempliiies `a boiler of this type whichl provides for an efcient interchange of heat to the water in theboiler sections from the combustion products in the firebox, through upwardly and inwardly inclined bafes to a lower duct or iiue which directs the gases longitudinally forward and then rearwardly through the upper flue tother stack. The invention also exemplifies a boiler of this type in which gases in the magazine are drawninto the iiue wh-ich leads to the stack for pre-- ventingcombustion in the magazine. The 'in-- vention also provides reversely inclined ribs `on thel sections for directing the sootv from the upper flue to the firebox during cleaning operations.

The invention is not to be understood as limited to the vdetails described, sincethese may be modified within the scopey of the appended claims without departing from the spirit and scopeof the invention.

Having thus described the invention, what I claim asl new and desire to secure by Letters Patent is:

l. In a boiler of sectional magazine feed type with a firebox having an inclined grate extending transversely across the box, a boilersection comprising walls forming sections of water conduits at the sides, respectively one of said conduit sections being ydisposed. substantially higher than the other and at one side of the upper end of the grate; side-legs of webformation between the conduit, sections and the base. of the boiler section; a water leg extending upwardly from the, lower conduit section; aif'uel magazine. section having an outer side .of webformation, an inclined lower portion at its inner side with a throat for fuel between saidI inclined portion, and a water leg extending directly between said inclined portion and the higher water conduit section; and a longitudinal flue section at the opposite side of the magazine having an upwardly and inwardly inclined bottom, the inner side of the fuel magazine and the flue sections having w-ater chambers therein.

2. In a boiler of sectional magazine feed type with a firebox having an inclined grate extending transversely across the box, a boiler-section comprising walls forming sections of water conduits at the sides, respectively, one of said conduit sections being disposed substantially higher than the other and at one side of the upper end of the grate; side-legs of web-formation between the conduit sections and the base of the boiler section; a water leg extending upwardly from the lower conduit section; a fuel magazine section having an inclined lower portion at its inner side with a throat for fuel between said inclined portion, and a water leg extending directly between said inclined portion and the higher water conduit section; a longitudinal iiue section at the opposite side of the magazine having an upwardly and inwardly inclined bottom, the in ner side of the fuel magazine and flue sections having water chambers therein; and a baffle extending upwardly and inwardly under and below the flue section.

'3. In ya boiler of sectional magazine feed 'type with a rebox having an inclined grate extend.

ing transversely across the box, a boiler-'section comprising walls forming sections of water conduits at the sides of the sections, respectively, substantially lat the upper and lower ends of the inclined grate, respectively; the upper end of the grate being disposed directly at the inner side of the upper conduit a water leg extending from the lower conduit section upwardly to the upperl portion of the section; legs of web-,formation between said conduit sections and the base; a

fuel magazine section having an inclined botto-'mv at its inner side and a throat between the lower end of the inclined Vbottom and the higher conduit section; 4a water leg connecting with the higher conduit section and the lower end of `the inclined bottom; and a longitudinal flue-section.

having a water chamber therein, at opposite. sideof the magazine. y

4. In a boiler of :sectional magazine feed type with a rebox having an inclined grate extending transversely across the bo-x, .a boiler-section comprising walls lforming sections of waterv conduits at the sides of the sections, respectively, said conduit sections being disposed substantially at the upper and lower ends of the grate, respec-` tively, the upper end of the grate being disposed directly at the inner side of the upper conduit the conduit section at the. upper end ofthe grate having an inclined inner .side portion provided with means for supporting ther upper end of the grate; water leg extending from the lower conduit section upwardly to the upper portion of. the section; legs of web-formation betweensaid conduitl sections 'and the base; a fuel magazin-e section having an inclined bottom at the inner side and a throat for fuel between the inclined: bottom and the water leg connecting withA thev conduitk section at the upper end of the grate; and a water leg extending directly between the higher conduit section and the lower end oi the magazine.

5. In abois-ler of sectional magazine feed type with an inclined grate, ay boiler-sectio1i compris-r ingk walls forming sections of water conduits at the sides of the sections, respectively; a water leg extending upwardly from one of said conduit sections to the upper portion of the boiler-section; a fuel magazine section at one side of the boiler-section; a longitudinal flue section at the opposite side having an upwardly and inwardly inclined bottom, a substantially vertical outer side and a substantially horizontal top, the iiuesection having a surrounding water chamber; and reversely inclined ribs on the faces of the boiler-section having an opening between their lower ends for the passage of soot from the flue to the rebox.

6. In a boiler of sectional magazine feed type with an inclined grate, a boiler-section comprising: walls forming sections of water conduits at the sides of the sections and at the upper and lower ends of the grate, respectively; a water leg extending upwardly from one of said conduit sections to the upper portion of the boi1er-section; a fuel magazine section at one side of the boiler-section; a longitudinal upper flue-section at the opposite side having an upwardly .and inwardly inclined bottom, a substantially vertical outer side, and a substantially horizontal top, the flue-section and inner side section of the magazine having water chambers; reversely inclined ribs on the faces of the boiler-section having an opening between their lower ends for the passage of soot from the flue to the firebox; and a flue-section under the bottom of the upper ue having spaces on its faces under the openings between the ribs.

'7. In a boiler of sectional magazine feed type with an inclined grate, a boiler-section comprising: walls forming sections of water conduits at the sides of the section, respectively; a water leg extending upwardly from one of said conduit sections to the upper portion of the boiler-section; a fuel magazine section at one side of the boiler-section; a longitudinal flue section at the other side, the magazine section having a vertical upper portion and an inclined lower portion and vertical ribs on its faces for tting contiguous boiler-sections and cut-away spaces at the upper ends of the ribs for drawing gases from the magazine into the flue, the flue-section and innerside of the magazine section having water chambers therein, said cut-away spaces having their lower Yends terminating a substantial distance above the ilue.`

8. In a boiler of sectional magazine feed type with an inclined grate, a boiler-section comprising: walls forming sections of water conduits at the sides of the sections, respectively; a water leg extending upwardly from one of said conduit sections to upper portions ofthe boilersection; a fuel magazine section at one side of the boiler-section; a longitudinal flue at the other side, the magazine section having a vertical upper portion and an inclined lower portion and ribs on its faces on the vertical and inclined portie-ns for iitting contiguous boilersections and cut-away spaces at the upper ends of the ribs for drawing gases from the magazine into the flue, the flue-section and innerside of the magazine section having water chambers therein, said cut-away spaces having their lower v ends terminating a substantial distance above the flue.

9. In a boiler of sectional magazine feed type with an inclined grate, a boiler-section. comprising: Walls forming sections of water conduits at the sides and at the top of the section, respectively; a water leg extending upwardly from one of said conduit sections to upper portions of the boiler-section; a fuel magazine section at one side of the boiler-section; a longitudinal flue at the other side under the top-conduit section, the magazine section having a vertical upper portion and an inclined lower portion and vertical ribs on its faces for fitting contiguous boiler-sections and cut-away spaces at the upper ends of the ribs for drawing gases from the magazine intothe iiue, the nue-section and innerside of the magazine section having Water chambers therein, said cut-away spaces having their lower ends terminating a substantial distance above the lower portion of the top-conduit section.

10. In a boiler of sectional magazine feed type with -an inclined grate, a boiler-section comprising: walls forming sections for a water conduit at the sides of the sections, respectively; a water leg extending upwardly from one of said conduit sections to the upper portion of the boilersection; a section of a fuel magazine at one side of the boiler-section; a longitudinal upper iiuesection having an upwardly and inwardly in-` cliined bottom, a vertical outer side and a substantially horizontal top, said bottom extending contiguously upwardly and inwardly from one side of the boiler-section and under the upper iiue; and an inwardly and upwardly inclined baffle having a water Chamber therein under and forming the bottom of the lower fluesection; and reversely inclined ribs at the bottom of the upper ue.

WILLIAM S. ANDERSON, JP..

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,063,088 Waddell May 27, 1913 1,544,582 Howell July 7, 1925 1,703,565 Anderson Feb. 26, 1929 1,800,915 Waddell et al. Apr. 14, 1931 1,808,391 Waddell June 2, 1931 

